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nalin [4]
2 years ago
12

Of 15 problems on a test, 13 were correct. What percent were correct?

Mathematics
1 answer:
grandymaker [24]2 years ago
8 0
Use long division to divide 13/15.
This will give you 0.8666... (repeating)
Multiply by 100 to get your percent.
\boxed{86.\overline6\%}
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In one day, Annie traveled 5 times The sum of the numbers of hours Brian traveled and two. Together they traveled 20 hours. Find
grigory [225]

5B + B = 20

6B = 20

B = 20 / 6  

= 10/ 3 hrs

A = 5 ( 10/3 + 2)

 = 5 (16/3)

 = 80 / 3 hrs  

 Brian traveled 10/3 hours and Annie traveled 80/3 hours.

6 0
3 years ago
I need help with 1-9 please!
Margaret [11]

1-First let’s list the numbers between 210 to 220, except the even ones since they’re a multiple of 2:

211; 213; 215; 217; 219

Let’s remove 213, and 219 because they’re multiples of 3 (2+1+3=6; 2+1+9=12), 215 is multiple of 5, so let’s remove it.

That leave’s is with 211, and 217.

We can remove 217, because it’s a multiple of 7, leaving us with 211.

2- It’s deductive reasoning, because you started with a more general idea.

3- {-7, -6, -5, -4, -3, -2, -1, 0, 1}

4- {x e R, x>=-2}

5-{-1, 0, 1}

6- {x∣-4≤ x ≤6}

7- [-20, ♾ )

8- On a number line, make a circle around -1, and continue the line to minus infinity.

9- On a number line, make a circle on -3, and continue to minus infinity. Make a ring on 0, and continue to infinity.

8 0
2 years ago
Can someone help me, please ?? im stuck 
Tresset [83]

Part A

5x - 5 >= 10 or-3x + 1 > 13

1) This is a disjunction (OR)

5x - 5 >= 10

5x >= 15  

 x >= 3

or

-3x + 1 > 13

-3x > 12

  x < -4

Answer

x <- 4 or x >= 3


Part C:

1) This is a conjunction (And)

5x+ 3 <= 18 and 4 - x < 6

5x <= 15       and  - x < 2

 x <= 3    and        x > -2

Answer

-2 < x <= 3

8 0
3 years ago
How many outer atoms and lone pairs are present in a molecule with a square pyramidal shape?
arlik [135]

Answer:

5 Outer and 1 lone pair

Step-by-step explanation:

A square pyramidal shape results when one of the bonds of an octahedron structure is occupied by a lone pair.

Hence there are 5 bonded atoms and one lone pair. The hybridization about the central atom is sp^{3} d^2.

One of the most common example is Xenon tetraflouride. XeF_4. Looking at its structure we can see that it has 5 pairs of outer atoms and one lone pair. With its coordination number 5. The shape of the orbitals is octahedral.

4 0
3 years ago
Please help me <br> This is the third time that I am asking and still no one has answered it.
olga55 [171]

Answer:

I'm 99% sure that it is $3,311

Step-by-step explanation:

sorry if i was wrong

4 0
3 years ago
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